References

Telcos:

EMT/Elion - Tele 2 - Elisa

Banks:

Swedbank - SEB - Estonian Savings Bank

Ministries:

Ministry of Justice - Ministry of  Defense - Ministry of Foreign Affairs 
Ministry of Social Affairs 

Others:

Mercedes Benz Car Centre - Estonian National Social Insurance Board 
Merko Ehitus head office - EBRD Tallinn Office - Estonian Post
Different Customs and Tax authorities - Hotel SAS Radisson - Playtech 
Skype (Microsoft) - Eesti Energia - Skanska Estonia - NCC - ABB - YIT 
Elcoteq (Ericsson) - Tallinn Airport - University of Tartu - Tartu City Government 
Eesti Post (Omniva) - MDC Max Dätwyler Eesti AS - Tartu County Council 
Tartu Brewery - North Estonia Medical Centre - Ämari airbase 
Tallinna City Theatre - Estonian Concert - Alas-Kuul AS